From this list of your particular oils smoke point we can assume if your oil is smoking you are already too hot for the THC to evaporate and be lost.

P.s. This post should be nominated for a sticky!

Note: Smoke point ranges can vary wildly based on many different factors.
Use the following temps only as a starting point.

200's
225 F: Canola Oil, Unrefined
: Flaxseed Oil, Unrefined
: Safflower Oil, Unrefined
: Sunflower Oil, Unrefined

300's
320 F: Corn Oil, Unrefined
: High-Oleic Sunflower Oil,
Unrefined
: Olive Oil, Unrefined
: Peanut Oil, Unrefined
: Safflower Oil, Semi-Refined
: Soy Oil, Unrefined
: Walnut Oil, Unrefined
325 F: Shortening, Emulsified
Vegetableâ?*
330 F: Hemp Seed Oil¥¥
350 F: Butter (Good Eats)
: Canola Oil, Semi-Refined
: Coconut Oilâ?*
: Sesame Oil, Unrefined
: Soy Oil, Semi-Refined

356-370 F: Vegetable Shortening

361-401 F: Lard

375 F: Olive Oil (Good Eats)

389 F: Macadamia Nut Oilâ?*â?*

400's
400 F: Canola Oil, Refined
: Walnut Oil, Semi-Refined

406 F: Olive Oil, Extra Virgin*

410 F: Corn Oil (Good Eats)
: Sesame Oil**

420 F: Cottonseed Oilâ?*
: Grapeseed Oil¥
: Olive Oil, Virgin**

430 F: Almond Oil***
: Hazelnut Oil***

435 F: Canola Oil (Good Eats)

438 F: Olive Oil*
: Rapeseed Oil***

440 F: Peanut Oilâ?*
: Sunflower Oilâ?*

450 F: Corn Oil, Refined
: High-Oleic Sunflower Oil,
Refined
: Peanut Oil, Refined
(Good Eats)
: Safflower Oil, Ref.
(Good Eats)
: Sesame Oil, Semi-Refined
: Soy Oil, Refined
: Sunflower Oil, Semi-Refined

460 F: Olive Pomace Oil**

468 F: Olive Oil, Extra Light*

485 F: Grapeseed Oil**

495 F: Soy Bean Oilâ?*

500's
510 F: Safflower Oilâ?*

520 F: Avocado Oil, Refined
Almond Oil*** 430 F
Avocado Oil: Refined 520 F
Butter (Good Eats) 350 F
Canola Oil: Unrefined 225 F
Semi-Refined 350 F
Refined 400 F
(Good Eats) 435 F
Coconut Oilâ?* 350 F
Corn Oil: Unrefined 320 F
(Good Eats) 410 F
Refined 450 F
Cottonseed Oilâ?* 420 F
Flaxseed Oil, Unrefined 225 F
Hazelnut Oil*** 430 F
Hemp Seed Oil¥¥ 330 F
Grapeseed Oil¥ 420 F
Grapeseed Oil** 485 F
Lard 361-401 F
Macadamia Nut Oilâ?*â?* 389 F
Olive Oil: Unrefined 320 F
(Good Eats) 375 F
Extra Virgin* 406 F
Virgin** 420 F
Olive Oil* 438 F
Pomace Oil** 460 F
Extra Light* 468 F
Peanut Oil: Unrefined 320 F
Peanut Oilâ?* 440 F
Peanut Oil, Refined
(Good Eats) 450 F
Rapeseed Oil*** 438 F
Safflower Oil: Unrefined 225 F
Semi-Refined 320 F
Refined (Good Eats) 450 F
Safflower Oilâ?* 510 F
Sesame Oil : Unrefined 350 F
Sesame Oil**: 410 F
Semi-Refined 450 F
Shortening, Emulsified
Vegetableâ?* 325 F
Shortening, Vegetable 356-370 F
Soy Oil: Unrefined 320 F
Semi-Refined 350 F
Refined 450 F
Soy Oilâ?* 495 F
Sunflower Oilâ?*: 440 F
Unrefined 225 F
Semi-Refined 450 F
Walnut Oil, Unrefined 320 F
Semi-Refined 400 F

High-Oleic Sunflower Oil,
Unrefined 320 F
Refined 450 F